* Update Gradle used in tooling subprojects
* Update Kotlin in Compose Gradle plugin
* Decrease verbosity of Gradle plugin tests
* Disable mac sign test
* Add workflow to test Gradle plugin
* Fix custom jdk tests on Linux
* Make Compose Gradle plugin build compatible with Configuration cache
* Print tests summary
* Remove unused code
* Refactor tests configuration
* Turn off parallel execution
* Try adding windows runner
* Turn off fail fast
* Fix Windows test issues
#2368
* Adjust default proguard rules
The following rule is needed to fix tests on Windows:
```
-dontwarn org.graalvm.compiler.core.aarch64.AArch64NodeMatchRules_MatchStatementSet*
```
Other rules are just to make builds less noisy.
Kotlin's `*.internal` packages often contain
bytecode, which triggers ProGuard's notes.
However, these notes are not actionable for
most users, so we can ignore notes by default.
#2393
Using one version of Gradle improves build
performance and dev experience by
reusing Gradle daemons, using less storage
& copying for Gradle cache, etc
* Replace usage of 'de.fuerstenau.buildconfig'
with a custom replacement, because the plugin
does not support Gradle 7.0+ and
there has not been any commit activity in 5 years
(https://github.com/mfuerstenau/gradle-buildconfig-plugin);
* Update 'com.github.johnrengelman.shadow' to 7.0.0
